Quick sling swivel with QD side slide button switch 1.25 inch trapezium loop phosphating grey 
 
Product description:
JIAQI QDM is a heavy-duty upgrade to standard push-button quick detach sling swivels. The innovative design fits all standard sized QD cups and allows for a lower profile sling swivel that offers one-handed manipulation, a high strength bale that rotates freely, canalizes sling webbing to prevent rollover, and superior resistance to corrosion with a QPQ finish.
JIAQI Sling swivel 1.25 Inch trapezium swivel loop with side slide button quick release detachable for rifle sling.
Feature:
High strength steel with phosphating grey finished.
The new side slide button switch makes the disassembling more easily.
Quick detachable design also allows fast installation & release.
Precision production for best fitting with universal housing on stocks and rails.
With 1.25 inch trapezium swivel loop, that could fit the bottom cover with 3/8" diameter perfectly.